有机锗的研究现状和发展趋势

主要介绍了有机锗的活性,总结了有机锗的作用及其机理,并对它的应用也做了简要的说明.同时根据它的研究现状对其发展趋势作了分析.     

烦恼 快乐 艺术——池莉“人生三部曲”解读

池莉的"人生三部曲"--<烦恼人生>、<不谈爱情>、<太阳出世>诉尽了普普通通的市民烦恼,小说中主人公被柴米油盐、吃喝拉撒、老婆孩子等琐事所烦着,从而构成他们的"烦恼人生".然而池莉通过自己的艺术创作,以积极的人生态度,又让读者体会到生活本身的快乐,"烦恼人生"中包含着"快乐人生".     

废水处理站自动控制系统的应用

介绍了邯钢冷轧废水站的配套项目废水处理站的自动控制系统,主要从自控设备组成、网络控制系统等方面论述了控制功能的实现,该系统的应用为ERP的数据采集提供了很好的保证,提高了电气控制的集成度和可靠性,简化了控制环节,提高了生产效率.     

杂质对Ti-55.8%Ni SMA低周弯曲疲劳性能的影响

真空感应熔炼时采用高纯氧化物坩埚及石墨坩埚, 保持其他控制参数不变, 得到名义成分为Ti-55.8%Ni的TiNi形状记忆合金铸锭, 经完全相同的加工工艺制备成Φ 1.5 mm的TiNi合金丝材. 用自制试验装置对所得TiNi合金丝材的室温低周弯曲疲劳性能进行评价. 研究发现, 使用氧化物坩埚熔炼所得材料的低周弯曲疲劳性能较使用石墨坩埚得到的材料有显著提高. 杂质成分分析及SEM形貌观察显示合金中第二相夹杂物有所减少, 这是其性能得到改善的主要原因. 采用随机安排对比试验结果的t检验方法可以判断, 氧化物坩埚使用中期所得到TiNi合金的疲劳性能较好. 认为坩埚的连续使用次数过多坩埚材料性能的恶化是造成周期疲劳变坏的主要原因.     

从软件开发项目看管理中的沟通

用任何方法或形式,在两个或两个以上的主体(如人或电脑)传递、交换或分享任何种类的信息的任何过程,就叫做沟通.要完成一个项目,需要具备各种才能和素质的人,由此产生了对组织或团队的需求,因此组织的成员都必须与他人共事.而沟通则是实现"共事"的必要条件.没有沟通就无法传达任务,组员不明确任务就无法工作.沟通要定位清晰,采取恰当的沟通渠道和方式,要以尊重他人为前提进行沟通交流,了解他人的性格个性,多倾听,鼓励,提高交谈技巧,表达要清晰.恰当的、及时主动的沟通能够避免软件项目开发中不必要的失误.     

基于可持续发展的企业组织结构创新研究

21世纪的中国要实现经济的发展,更要实现经济的可持续发展.作为支撑国家经济支柱的企业同样如此.当代企业应该以什么方式发展,才能与可持续发展的命题相一致,这是一个重要的课题.本文从企业可持续发展的内涵着手,分析了我国企业组织实现可持续发展所面临的问题,提出了几点基于组织创新的企业可持续发展的对策.     

电炉电极降耗机理及工艺研究

石墨电极是电炉炼钢和钢包精炼炉的主要加热部件,但电极消耗也是在炼钢过程中所不可避免的消耗材料.电极消耗成本是电弧炉炼钢的主要成本之一.针对近年来电弧炉炼钢居高不下的电极消耗量,相关领域的冶金炼钢专家对此做了深入分析研究,并取得了很好的效果,降低了电极的消耗.然而与国外先进炼钢生产水平的电极消耗相比仍有相当的差距.为此,针对这一现状对电炉电极消耗机理及国内外研究现状做了综合性的分析研究,旨在为电弧炉电极研究专家及工作人员的系统研究做详细的总结陈述,以便于电极的研究与生产.     

赤泥絮凝分离机理的研究进展

合成高分子絮凝剂在赤泥絮凝分离中有重要的应用,首先介绍了稀释矿浆的性质及絮凝剂的作用形式,然后对各种絮凝剂在氧化铝赤泥沉降分离中絮凝机理的研究现状进行了综述,并提出了氧化铝工业用絮凝剂的发展方向.     

黄金价格和石油价格的联动分析

黄金和石油的价格波动在大多数时候呈正向联动关系,虽然没有严格的数字比例关系,但是其波动趋势往往相同.这主要是因为影响黄金价格和石油价格波动的因素中,有一部分影响因素是相同的,如美元汇率、通货膨胀、主要石油生产国(特别是石油输出国组织)对黄金的运作以及国际上的重大政治事件.当这些相同的影响因素事件发生,特别是对国际市场产生重大影响时,石油价格和黄金价格的走势通常趋向一个方向;但是,出于各种各样的原因,也产生了数次背离.     

浓缩-沉淀法制备铟锡氧化物(ITO)微米棒状粉末的试验研究

文章利用新颖的浓缩析出加煅烧工艺、制备了微米级ITO棒状粉末.借助X射线衍射(XRD)对棒状粉末进行了相结构研究;利用扫描电镜(SEM)对棒状粉末形貌进行了相关的表征;用能量分散谱仪(EDS)以及化学分析方法对粉末的化学成分进行了分析;利用热分析仪(TG-DTA,TG-DTG)对粉末的受热行为进行了相关的表征.结果表明:绝大部分ITO棒的直径位于2～9 μm,而且约95%的棒的长径比大于6;ITO棒中的Sn含量主要富集于表面,而且由棒的表面向核心区逐渐递减,这与Sn的引入方式有关;In(OH)3棒中应该存在含In的硝酸盐或亚硝酸盐;In(OH)3强烈的脱水发生在260～280 ℃,随后在更高的温度下形成ITO固溶体.     

铝及铝合金中元素分析的标准应用现状与方法研究进展

从中国国家标准、中国有色行业标准、中国航空行业标准、中国进出口检验检疫行业标准、ISO国际标准、日本标准、欧洲标准、美国材料与试验协会(ASTM)标准等160余项国内外标准分析方法的角度,介绍了各区域和行业的标准分析方法现状。结合文献(期刊论文)方法,进一步综述了湿法化学分析方法和现代仪器分析方法及试样制备与预处理方法在铝及铝合金50余种元素项目分析中的应用现状和研究进展,重点评述了紫外-可见分光光度法、滴定法、重量法、电化学方法、火花放电原子发射光谱法、X射线荧光光谱法、原子吸收光谱法、电感耦合等离子体原子发射光谱法、质谱法、红外吸收法、热导法等分析方法的基本特点、测定范围和应用实例。引用文献74篇。     

A test of the 1992 International Standards for Neurological and Functional Classification of Spinal Cord Injury

This study was designed to test the 1992 International Standards for Neurological and Functional Classification of Spinal Cord Injury. One hundred and six professionals in the field of spinal cord injury attending an instructional course at the 1994 ASIA Meeting participated in the test. Participants completed a pretest and posttest in which they classified two patients who had a spinal cord injury (one with complete tetraplegia and one with incomplete paraplegia) by sensory and motor levels, zone of partial preservation (ZPP), ASIA Impairment Scale and completeness of injury. Between tests, three members of the ASIA Standards Executive Committee gave presentations on the neurological assessment, scoring, scaling and classification of spinal cord injury and a video of the actual examinations of the two cases was viewed. Percent 'correct' (as defined by the ASIA Standards Committee) was calculated for sensory and motor levels, ZPP, ASIA Impairment and completeness. Overall, the analyses showed that participants had very little difficulty in correctly classifying the patient with complete tetraplegia. Pretests scores ranged from 72% (left motor level) to 96% (complete injury), posttest scores from 73% (left motor level) to 100% correct (complete injury). For the patient with incomplete paraplegia (Case 2), scores were considerably lower. Pretest scores ranged from 16% (right motor level) to 95% correct (incomplete injury); posttest scores from 21% (right motor level) to 97% correct (incomplete injury). The results showed that further revisions of the 1992 Standards and more training is needed to ensure accurate classification of spinal cord injury.     

转炉低成本开发GR60美标钢筋的生产实践

总结了转炉低成本开发GR60美标钢筋的生产实践，采用本工艺生产GR60美标钢筋不仅可以获得可靠的力学性能，而且可比用微合金化工艺降低成本120元／t，经济效益良好。     

替代扩散合金化粉末的粘结剂处理粉的研制

为替代扩散-合金化粉末,研制了巧妙设计的粘结剂处理的预混合粉.一类粘结剂处理的材料,符合MPIF标准35"粉末冶金结构零件材料标准"中扩散-合金化材料的化学组成范围.另一类粘结剂处理的预混合粉,是用来替代高性能扩散-合金化材料的,这些材料都是以含Mo 1.5%(质量分数)的预合金化低合金钢为基体的.考察了新材料的烧结态和淬火-硬化与回火状态的性能,并将之和化学组成相似的扩散-合金化材料进行了比较.     

Punishment or distraction? Operant stuttering revisited.

In a partial replication of a study by B. Flanagan, I. Goldiamond, and N. Azrin (see 34:1), 6 male stutterers enrolled in a psychology speech clinic were tested during successive readings of a given passage. 3 experimental conditions were employed using a 4000-cps tone at an intensity of 108 db., International Standards Organization hearing level, to determine the effect of this stimulus upon stuttering behavior. Conditions were (1) an aversive condition in which the presentation of the tone was contingent upon stuttering; (2) an escape condition in which cessation of the tone was contingent upon stuttering; and (3) a random condition in which the tone was presented independent of Ss' disfluencies. Findings, differing from those of Flanagan et al., were that stuttering decreased in all conditions. Results are attributed primarily to distraction effects. (26 ref.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Standards for providers of psychological services.

Presents revised Standards for Providers of Psychological Services that differ from the original Standards in 2 respects: (1) Minimally acceptable levels of quality assurance and performance are defined and (2) a more limited range of services is covered. The Standards illuminate weaknesses in the delivery of psychological services and point to their correction. These Standards establish a more effective and consistent basis for evaluating the performance of individual service providers and guide the organizing of psychological service units in human service settings. The 4 standards concern providers, programs, accountability, and environment. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Implementation of quality assurance in national foot and mouth disease laboratories, based on the guidelines of the Office International des Epizooties

The final act of the Uruguay Round of the General Agreement on Tariffs and Trade, 1994, contains the Agreement on the Application of Sanitary and Phytosanitary Measures, which aims to reduce the negative effects of health barriers on international trade to a minimum. Therefore, the Office International des Epizooties (OIE) Regional Commission for Europe proposed that an accreditation system based on the EN 45000 standard should be applied to achieve international recognition of certificates and testing laboratories. To this end, the OIE Standards Commission published a series of guidelines for the evaluation of laboratory quality and proficiency testing. In 1995, the Food and Agriculture Organization European Commission for the Control of Foot and Mouth Disease recommended that the OIE proposal should be applied in all foot and mouth disease (FMD) diagnostic laboratories in Europe. This review summarises the EN 45001 standard and the OIE guidelines, and proposes that these guidelines should be taken as a basis for the implementation of a quality assurance programme in FMD laboratories.     

The Supreme Court and the APA, AERA, NCME test standards: Past references and future possibilities.

A survey of US Supreme Court references to the Standards for Educational and Psychological Tests and to federal agency guidelines on testing over the past 7 yrs suggests that the Court is beginning to rely on the Standards as an authoritative source for objective answers to technical, psychometric questions. Implications of this trend for the Joint Review Committee on Test Standards, its parent organizations, and the relationship between science and government are discussed. It is suggested that agency guidelines are based on a combination of research evidence and policy preferences. It is further suggested the Standards should not be based on such evidence and preferences and will be most useful to the Court if they maintain scientific fidelity. (4 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

热等静压(HIP)技术在金属材料方面的应用

本文对北京’９９ 国际热等静压会议有关论文中提到的热等静压技术的新应用及新的研究动向进行了评述。文章共分四个部分, 即热等静压技术在钛合金、高温合金、铍材以及难熔金属等方面的应用。     

世界最具竞争力钢铁企业的经营之道

介绍了谢韦尔钢控股集团的竞争力和谢韦尔钢控股集团下属三大经营板块的发展壮大过程，包括谢韦尔俄罗斯钢公司、谢韦尔国际公司和谢韦尔矿产资源公司。阐述了谢韦尔钢控股集团为提高企业竞争力所采取的具体措施，并分析了谢韦尔钢控股集团的生产经营之道。